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Large Catalogue Query Performance in Relational Databases

Published online by Cambridge University Press:  05 March 2013

Robert A. Power
Robert A. Power*
Affiliation:
CSIRO ICT Centre, Canberra ACT 2601, Australia. Email: [email protected]
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Abstract

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The performance of the mysql and oracle database systems have been compared for a selection of astronomy queries using large catalogues of up to a billion objects. The queries tested are those expected from the astronomy community: general database queries, cone searches, neighbour finding and cross matching. The catalogue preparation, sql query formulation and database performance is presented. Most of the general queries perform adequately when appropriate indexes are present in the database. Each system performs well for cone search queries when the Hierarchical Triangular Mesh spatial index is used. Neighbour finding and cross matching are not well supported in a database environment when compared to software specifically developed to solve these problems.

Keywords

astronomical data bases: miscellaneouscatalogssurveys
Type
Research Article
Information
Publications of the Astronomical Society of Australia , Volume 24 , Issue 1 , 2007 , pp. 13 - 20
Copyright
Copyright © Astronomical Society of Australia 2007

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